Liquid level control means



April 17, 1945.; A. BURCKHARDT ET AL 2,374,076

LIQUID LEVEL CONTROL MEANS Filed July 27, 1943 446/ @2221 Y ems g? g #14ATTORNEY Patented Apr. 17, 1945 g a Delaware:

" 'Ilhis. inventionrrelates to.a.device:fon

I liquid;at two different levelsf-rom'asinglesource oflliquidrsupply. Itis the. object of the. invention... to. provide,.; a primary,liquidsupply container, wherein. a' p e-- determined level is. normally.maintained, and. a,-

secondary container, which is. adapt'edtoreceive aliquid supply.through. arr outletfrom.= the prii--.

mary container, and to further provide: a pres- I sure chamber wherein:an-increase of air pressure is efiected when the liquid. rises aboveapredetermined level in the secondary container which will cut ofi thesupply from the' primary container after rising to a predeterminedlevel.

With the above and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that various changesin theprecise embodiment of the invention herein disclosed may be made withinthe scope of what is claimed without'departing from the spirit of theinvention.

A preferred embodiment of the invention is illustrated in theaccompanying drawing, wherein: f

Fig. 1 is a plan view of the device; and

Fig. 2 is a vertical sectional view through the device as taken alongthe line 2-2 of Fig. 1.

Referring to the drawing in detail, the device comprises a primarycontainer I 0, and a secondary.container II, which are adapted to bejoined together as indicated in the drawing or may be formed as anintegral unit.

A liquid supply is provided for the primary container In by means of aninverted bottle l2, the

' level being regulated in accordance with the position of the mouth ofsaid bottle in a well known manner, so long as liquid is containedwithin the bottle.

An outlet comprising atube I4, is inserted in the primary container l0,whereby liquidmay and has an open lower end as indicated at FL 5 Saidtubular member 15; isfada ptedto. envelope. the outlet. end. of the,drain tube, 141 and has. a larger. tubular cross sectionthanthat'jofthe. out let tube! 41 The tubular. member, i 5 is adapted .t'o "besecured to.. the container In or. may be formed as,integfral.pa'ntlthereoih'.v

[In operation; when; liquid. reaches. a. level? inthe primary container.lil, as'ilimited by, the mouth t3 of the bottle i2, a,drain-.wi1 1i be.effected.

throughthe tube. l4 into. the. secondary. container H.v The liquid}.upon. rising. inthe container IL. will eventually pass over. the; open.end; ll of.

the tubular pressure chamber l 5; and will there after build up apressure in said chamber. As the liquid continues to rise in thesecondary container H, the pressure will increase until it is equal tothe pressure of the liquid within the tube [4, thereby stopping theflow. The level of the liquid within the secondary container ll will bemaintained at a distance above the level within the pressure chamber IS,the said distance being equal to .the head maintained above thedischarge end of the outlet, as indicated by the reference characters Hand H. Hence, a level is maintained within the secondary container l l,which is lower than the normal liquid level maintained in the'chamberl0.

Through a discharge outlet l8 and hose connection l9, a supply of liquidis adapted to be pro-' vided from the container ill at the levelindicated at L, for any desired means. In the same manner liquid isadapted to be supplied at a level L" from the container ll, through adischarge outlet 2| and hose connection 22.

As the liquid level recedes slightly in the secondary container II, theair pressure in chamber l5 decreases accordingly and a slight flow fromoutlet tube M will start. This slight flow will again increase thepressure sufficiently to immediately stop the flow, thus maintaining asubstantially constant level in the secondary container.

Having described the invention, what is claimed is: I

1. A two level liquid control system comprising two adjacent liquidcontainers, means for sup plying liquid to one of said containers andmaintaining a predetermined liquid level therein, outlet means wherebyliquid may flow from the first Y to the second of said two containers,and a pres- "sure chamber enveloping a portion of said outlet means andhaving an open mouth projecting into the second named container, whereinair pressure will buildup as the liquid rises within the open mouth ofthe pressure chamber, to

thereby stop the flow through the outlet means when the pressure in thechamber equals the pressure of the liquid flow from the outlet means.

2. A two level liquid control device comprisin a primary containerhaving liquid maintained therein at a predetermined level; a secondarycontainer arranged to receive liquid from the primary container; outletmeans through which liquid may flow from the primary to the secondarycontainer; a pressure chamber associated with said outlet meansincluding a tubular member enveloping the outlet end of said outletmeans and having its lower end open and projecting into the secondarycontainer; whereby liquid flowingfrom said outlet means into thesecondary container will, upon rising above the open end of the pressurechamber, effect suilleient pressure within the tubular member to stopthe flow of liquid through the outlet means from th rimary container andthereby produce a controlled liquid level in the secondary container ata difierent level from that in the primary container.

3. A two level liquid control devicecomprising a primary containerhaving liquid ma ntained therein at a predetermined level; a secondarycontainer arranged to receive liquid from the primary container, meansincluding a discharge tube having an inlet end projecting into theprimary container and an outlet end projecting outwardly from saidprimary container, whereby liquid may flow from the primary to thesecondary container; a pressure chamber associated with the outward tubeprojection including a tubular member having its lower end open andprojecting into the secondary container, whereby liquid flowing fromsaid outlet into the secondary container will, upon rising above theopen end of the pressure chamber, efiect a pressure within the pressurechamber equal to the pressure at the outlet end oi the discharge tube tostop' the flow of liquid through the tube outlet in the primarycontainer, and thereby produce a controlled liquid level in thesecondary container at a different level from that in the primarycontainer.

4. A two level liquid control device comprising a container havingliquid maintained therein at a predetermined level, a second containerarranged to receive liquid from the first named container, an outletcomprising a tube projecting from the first named, container throughwhich liquid may flow from the first to the second named container. atubular closure enveloping the outlet end of the outlet tube and havinan open lower end projecting into the second named container,- saidtubular closure having a larger opening thanthe discharge end of theoutlet tube; whereby liquid may flow from the first namedcontainer tothe second and when the liquid in the second named container rises abovethe open lower end of the tubular closure, a pressure will be effectedwithin the tubular closure to stop the flow through the outlet tube.

' ALFRED BURCKHARDT.

JOSEPH'V. EDMAN.

